Browsing by Author "Singh, Yumlembam Priyananda"

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    A colubrid snake from the late Miocene of Kutch, Gujarat, India
    (Palaeontological Society Of India, 2021-12-31T00:00:00) Singh, Ningthoujam Premjit; Singh, Nongmaithem Amardas; Kumar Sharma, K. Milan; Patnaik, Rajeev; Singh, Yumlembam Priyananda; Chaudhary, Deepak
    Fossil snakes are extremely rare in the Indian Neogene records. We report the first record of isolated precloacal vertebrae of a �colubrine� snake from a late Miocene site, Tapar section in Kutch, Gujarat (India). The present specimens differ from the earlier finding of a colubrid from a younger deposit of Labli Member, Utterbaini Formation of Upper Siwaliks (Jammu and Kashmir) by the absence of hyapophyses. The �colubrine� snakes of late Miocene (~11-10 Ma) perhaps lived in a relatively wetter environment compared to the present �colubrine� from Kutch. � 2021 Palaeontological Society Of India. All rights reserved.
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    Evolution of the Permo-Triassic Satpura Gondwana Basin, Madhya Pradesh, India: Insights from geochemical provenance and palaeoclimate of the siliciclastic sediments
    (John Wiley and Sons Ltd, 2022-10-19T00:00:00) Singh, Yumlembam Priyananda; Kingson, Oinam; Sharma, Kongrailatpam Milankumar; Ghosh, Prosenjit; Patnaik, Rajeev; Tiwari, Raghavendra Prasad; Pattanaik, Jitendra Kumar; Kumar, Pankaj; Thomas, Harel; Singh, Ningthoujam Premjit; Singh, Nongmaithem Amardas
    Geochemical study in the siliciclastic sediments of a basin provides an understanding of palaeoclimate, provenance and subsequently, it can be used to reconstruct the palaeo-tectonics and evolution of the basin. Sedimentation in the Gondwana basins, worldwide, generally provides a record of climatic fluctuations and evidences of the Permo-Triassic mass extinction. In spite of its global importance, our knowledge about the nature of sedimentation, basin development and conceptual regional tectonic model in the Satpura Basin, one of the Gondwana basins of India is limited. Major and trace element concentrations of the mudstones from the Denwa Formation along with the existing geochemical data of other formations are studied here for establishing a comprehensive idea about the palaeoclimate, tectonic settings, provenance and basin evolution. The composition of the sediments in the lowermost Talchir Formation revealed cold and dry climatic conditions at the sources, whereas the sources of the sediments for the overlying formations have experienced warm, humid and semiarid climates. The contributions of the mafic rock-derived sediments are relatively higher in the Talchir, Barakar and Motur formations compared to the overlying formations. Approximately 60% of the sediments in the overlying Bijori, Pachmarhi and Denwa formations were derived from the felsic volcanic rocks and granites of the Sausar Mobile Belt and Betul-Chindwara Mobile Belt (BCMB) with minor inputs from mafic volcanic rocks of the BCMB. Furthermore, the sediments of the Talchir Formation were derived from the BCMB when they became tectonically active, whereas the sediments in the younger formations have been derived from a passive tectonic setting. � 2022 John Wiley & Sons Ltd.